package com.heima.app.gateway.filter;

import com.heima.utils.common.AppJwtUtil;
import io.jsonwebtoken.Claims;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.annotation.Order;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;
@Component
@Order(-1)
public class AuthorizeFilter implements GlobalFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
//        获取请求d对象和响应对象
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
//        判断是否登录
        if(request.getURI().getPath().contains("/login")){
            return chain.filter(exchange);
        }
//        获取token
        String token = request.getHeaders().getFirst("token");
//        判断token是否存在
        if(StringUtils.isEmpty(token)){
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete(); //终止放行返回401
        }
//        判断token是否有效
        Claims claimsBody = AppJwtUtil.getClaimsBody(token);
//        判断是否过期
        int result = AppJwtUtil.verifyToken(claimsBody);
        if(result==1||result==2){
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }


        return chain.filter(exchange);
    }
}
